Check for loom needle motion



Nov. 24, 1925. 1.562.659

w. W. RQBERTSGN cnw; ron mol NEEDLE no1-rou Fed vIlay 9. 1925 PatentedNov. 24, 1925.

UNTEO STATES WILLIAM VT. ROBERTSON, OF WORCESTER,

rArsur orties..

MASSACHUSETTS, 'ASSIGNOR TO CROMPTON & KNOW'LES LOOM'. WORKS, OFWORCESTER, MASSACHUSETTS, A CORPORATON OF MASSACHUSETTS.

CHECK FOR LOOM NEEDLE MOTION.

Application filed May 9, 1925.

Be it known that- I, VILLIAM WV. Ronirrson, subject of the King of GreatBritain, residing at Vorcester, in the county of Worcester and State ofMassachusetts, have invented a new and useful Check for Loom NeedleMotion, of which the following is a specification.

This invention relates to improvements in needle motions for Axminsterlooms and an object of the invention is to provide a periodicallyactuated device for checking the motion of the needle.

It is a further object of the invention to provide a check which Willsupply maximum pressure near the end of the needle motion hut which willreduce the pressure at the end of the motion so that the needle may hewithdrawn easily.

Vith these and other objects in views which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein l have shown one embodiment of myinvention7 F ig. l is a front elevation of the end portion of anixminster loom having my invention applied thereto,

`Fig. 2 is an enlarged front elevation of the check, parts being brokenaway for the sake of clearnessJ Fig. 3 is a vertical section on line 3-3of Fig. 2,

Fig. 41 is a fragmentary top plan of the guide plate looking in thedirection of arrow 4t, Fig. 2 and showing the check lever supportedthereon,

Fig. 5 is "a detail vertical section on line 5-5 of F ig. 2, and

Fig. 6 is a' vertical section on line 6-6 of Fig. 2.

Referring more particularly to the drawings it will be seen that I haveprovided a loom side 10 to which is secured. an vend frame 11 extendingas shown herein from the right hand side of the loom. A driving shaft 12is suitably mounted on the end frame and has secured thereto a crank-13connected ley means of linlr' 14.- to a segment 15 pivotally mountedwith respect to the end frame by means not shown. A shaft 16 is mountedin hearing 1T carried by the end.

Serial No. 29,204.

frame 11 and has secured thereto a pinion 18 which meshes with thesegment 15. A drum 19 is secured to the shaft and rotates with thepinion as the latter is moved by the segment. Stand 20 mounted on theframe 11 supports needle rail 21 which as shown in Fig. 3 is providedwith an undercut ledge 22. A guide plate 23 is secured to the bar 21 andhas a bevel surface 24; which cooperates with the undercut ledge 22 toform a triangular guide. Needle 25 is secured to a triangular slide 26mounted for` movement in the guide previously described and havingformed integral. therewith a block 27. A clamp 27'2L is secured to theblock by bolts 28 and serves to bind the rope or other flexible band 29to the slide 26 and needle 25. A rope 29 is wrapped around and issecured to the drum 19 and receives motion -as the latter rotates. Themattei' thus far described is of common construe tion and forms no partof my inventiom the regular vibration of shaft 12 resulting in a hackand forth movement of the block 2'? to move the needle into and out ofthe shed.

My improvements relate to means for arresting the motion of the block 27and needle 25 and in carrying out my invention I provide the plate 23with a slot ll0 in which is mounted for free movement a check lever 4171pivoted as at i2 to the plate. As shown in Fig. 5 the lever t1 has theupper surface thereof beveled so that when raised it will Contact withthe-lower face of slide 26.

In order to give the lever 41 its checking movement I mount on theneedle rail a stud 43 on which is mounted for free movement a lever 44the upper end of Which is rounded as shown in Fig. 2 and normally heldupright as shown in Fig. lloy a spring l5 interposed 1oetween the lowerend of the lever and a screw 4:6. An arm 47 extends laterally from thelever. 44C and has slidably mounted therein a spring pressed pawl i8positioned for engagement vvith'the teeth 'of ratchet 49. 'As shown inFig. 6 said ratchet has a reduced hub 5() to which is secured a check`wheel 51 by means of a `pin 52, this con struction requiring that thecheck wheel and ratchet move together when the latter actuated by theadetent. As shown in Fig.

2 said check wheel is provided with a plurality of dents which areformed to receive the lower end 54. of check lever et,

said dents being separated by raised cam portions 55.

In normal operation, with the needle approaching the end oit its stroke,the parts are in the position shown in Fig. l with end 54 in a notch 53,and as the block 27 approaches the inner end of its travel it willengage the lever 44 and move the same to the position shown in Fig. 2.As this movement takes place the detent 48 is given a eountercloekwisemovement to move the ratchet 49 and check wheel 5l to the left and oneot the cams 55 will pass under the end 54 of the lever 4l, raising thelatter against the lower face of slide 26 to cause additional frictionthereon for the purpose of stopping the block 27 and needle 25. As theblock reaches the end of its stroke one of the dents 53V will come underthe lever 41, permitting the latter to fall away from the slide 26 torelieve pressure thereon. In order to position `the needle at the innerend of its stroke I provide a block 56 secured to the needle rail 2l inposition to be engaged by the block 27 as the latter moves inwardly. Onthe return movement of the block spring 45 will restore the lever 44 tothe position shown in Fig. l. and retrograde movement ot the ratchet andcheck Wheel will be prevented by engagement ot the block with the lever4l atter said block has moved out of contact with lever 44. It will benoted in Figs. l and 2 that the upper end of the check lever 4l extendsto the right of the lever 44 and is therefore engaged and held againstupward movement during the whole time that the lever 44, ratchet 5l andpawl 48 are returning to normal position, Any tendency ot the checkwheel and pawl to turn will therefore be resisted and the pawl 48 willbe moved into engagement with a fresh tooth on the ratchet.

From the foregoing it will be seen that I have provided the needlemotion of AX- minster looms with a cheek which is actuated by some partmoving with the needle and that the pressure is relieved at the extremeend of the stroke to permit easy return movement of the needle. It willalso be seen that the parts are so constructed that the return movementof the needle dees not etfe'ct retrograde movement of the ratchet andcheck' wyheel.

Having thus described my invention it will be apparent that changes andmodifications may be made therein by those skilled in the art Withoutdeparting from the spirit scope of the invention, and I do not wish tobe limited to the details herein disclosed but what I claim is:

1. In a needle motion forAmninster looms comprising a needle and a bleekmovable therewith, a check lever movable into cheeking relation withrespect to the block. and

means actuated by the bleek as the latter nears the end of its stroke tomove said lever into checking position. v

2. In a needle motion lor r-imninster looms having a needle and a blockmovable there- 5 with, a check lever, a block engaging lever to beengaged by the block as the latter' nears the end of its stroke, andintermediate connections between said levers to give the cheek lever a.ychecking movement when the block lever is moved by the block.

In a needle motion for Amninster looms having a needle and a. blockmovable therewith, a check lever a block engaging lever normally in thepath of the block, means including a cam tace normally in contact withthe check lever and movable with the block lever as the latter nears theend of its stroke to actuate said check lever and move the same tochecking position.

4. In a. needle motion for Axminster looms comprising a needle and ablock movable therewith, a needle rail, a needle plate secured thereto,a check lever guided in the plate and pivotally mounted thereon toengage av portion o't the block, and means operative by the block as thelatter nears the end ot its stroke to move the check lever intol'rictional engagement with the block.

5. In a needle motion for Axininster looms comprising a needle and ablock movable therewitli, a needle rail, a plate secured thereto andhaving a. beveled tace to engage a correspondingly formed part of theblock, a cheek lever guided in and pivotally mounted on said plate andhaving the upper end thereot beveled, and means to move said lever intorietional contact with the block as the latter nears the end of itsstroke.

6. In a. needle motion l'or Amninster looms comprising a. needle and a.block movable therewith, a cheek lever mo fable into trictional Contactwith the block, a block engaging lever normally positioned in the pathof the block and i'no'vable thereby as said block nea-rs the end of itsstroke, a check wheel. having dents and cam faces to engage a portionoit' the check lever, a ratchet secured to the check wheel, a paw]slidably mounted with respect to the block lever tomove said ratchet andcheck wheel with said block lever, and means to return said block leverto normal position in the path of the block, said check lever holdingthe cheek wheel and ratchet against retrograde movement.

7. In a. needle motifni -for Anminster looms comprising a needle andablock` movable therewith, check lever movable into trictional engagementwith the block, a block lever normally in the path ol the block, meansintermediate the levers to move said 'check lever into trictionalcont-act with the bleek as theI latter engages and moves the blocklever, said checklever extending beyond the normal posi-tion oi theblock lever` ltlll so that the latter will he released before the tocheck the needle as the latter approaches block movesl to preventretrograde movement the end of its stroke, and means to relieve the ofthe means intermediate the levers. pressure of the Cheek as the needlereaches l0 8. In a needle motion for Axminster looms the extreme end ofits stroke.

having a needle and ey block secured thereto In testimony Whereotl Ihave hereunto afund movable therewith, ay cheek device aetulixed mysignature. ated by the block to apply pressure thereto WILLIAM W.ROBERTSON.

